Malicious code in beaver-ui-list (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1f257786868c5d56c3f9f79e674980d07bfad3a42194819837623614554abb77) On require('beaver-ui-list'), index.js loads _ext.js, which selects a payload path based on OS and architecture, downloads a native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT chunked fallback to *.dl.wel1.ru, writes it to /tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh or cmd. Host and domain literals are assembled at runtime from split-string arrays joined with.join("") to defeat static inspection, and a.analytics_state marker file plus a check of DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK environment variables provide a telemetry cover story. The package advertises itself as a UI component library; the payload delivery and execution have no relationship to that purpose and grant arbitrary code execution on the installer's host on module load. ## Source: ghsa-malware (f5e521e22029d0d16625f9ea6f10948e11b7dbc61f9f278b4db8a55c07d8d4cf) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
AI Analysis
Technical Summary
The beaver-ui-list npm package version 35.4.4 includes malicious functionality in its index.js file that loads an auxiliary script (_ext.js). This script determines the operating system and architecture, then downloads a native binary payload from specific Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT chunked fallback to *.dl.wel1.ru. The payload is written to the system's temporary directory under a disguised filename (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), permissions are set to executable (0755), and it is spawned detached via /bin/sh or cmd. The code uses runtime string assembly to evade static detection and checks environment variables related to telemetry to provide a cover story. This behavior results in arbitrary code execution on any system that installs and loads this package.
Potential Impact
This malicious package enables arbitrary code execution on the host system during module load, which can lead to full system compromise, data theft, persistence, or further malware deployment. Because the payload is downloaded and executed without user consent or awareness, any environment that installs this package is at significant risk.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately avoid installing or using beaver-ui-list version 35.4.4. Remove any existing installations of this package and scan affected systems for the presence of the downloaded payload binaries in temporary directories. Monitor for suspicious processes spawned from temporary locations with disguised names. Consider using trusted package sources and verifying package integrity before installation. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for updates.
Malicious code in beaver-ui-list (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (1f257786868c5d56c3f9f79e674980d07bfad3a42194819837623614554abb77) On require('beaver-ui-list'), index.js loads _ext.js, which selects a payload path based on OS and architecture, downloads a native binary from hardcoded Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT chunked fallback to *.dl.wel1.ru, writes it to /tmp or %TEMP% under a disguised name (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), chmods it 0755, and spawns it detached via /bin/sh or cmd. Host and domain literals are assembled at runtime from split-string arrays joined with.join("") to defeat static inspection, and a.analytics_state marker file plus a check of DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK environment variables provide a telemetry cover story. The package advertises itself as a UI component library; the payload delivery and execution have no relationship to that purpose and grant arbitrary code execution on the installer's host on module load. ## Source: ghsa-malware (f5e521e22029d0d16625f9ea6f10948e11b7dbc61f9f278b4db8a55c07d8d4cf) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The beaver-ui-list npm package version 35.4.4 includes malicious functionality in its index.js file that loads an auxiliary script (_ext.js). This script determines the operating system and architecture, then downloads a native binary payload from specific Cloudflare Workers hosts (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev) with a DNS-TXT chunked fallback to *.dl.wel1.ru. The payload is written to the system's temporary directory under a disguised filename (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), permissions are set to executable (0755), and it is spawned detached via /bin/sh or cmd. The code uses runtime string assembly to evade static detection and checks environment variables related to telemetry to provide a cover story. This behavior results in arbitrary code execution on any system that installs and loads this package.
Potential Impact
This malicious package enables arbitrary code execution on the host system during module load, which can lead to full system compromise, data theft, persistence, or further malware deployment. Because the payload is downloaded and executed without user consent or awareness, any environment that installs this package is at significant risk.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately avoid installing or using beaver-ui-list version 35.4.4. Remove any existing installations of this package and scan affected systems for the presence of the downloaded payload binaries in temporary directories. Monitor for suspicious processes spawned from temporary locations with disguised names. Consider using trusted package sources and verifying package integrity before installation. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12817
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a738536bf8831d5394f0ba8
Added to database: 08/05/2026, 18:47:18 UTC
Last enriched: 08/05/2026, 18:59:30 UTC
Last updated: 08/16/2026, 13:02:56 UTC
Views: 22
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